Polylock nut. After you set the lifter preload, snug up the set screw but do not over tighten (no more than 15 lb/ft torque). C3 Tech/Performance - "Poly lock" specifics and recommendations - Hey all. 600 in. . --Each rocker's arm features CNC Set poly lock Back off the set screw and set the poly lock just like you would a stock rocker nut or 1/2 to 1 turn past zero lifter preload, depending on what type hydraulic lifters are being used. 1007 parts at JEGS. Minimum Rocker Slot Width (in): 0. One important note - you'll need tall-style valve covers to clear this girdle, so make sure your setup can accommodate that. Scroll with the mouse wheel, or pinch with the trackpad, to zoom Browse Rocker Accessories- Polylocks, Lock Nuts, and Rocker Balls Products McMaster-Carr is the complete source for your plant with over 700,000 products. The plastic material means these n DESCRIPTION --For Chevy 350 SBC 1. Shop Now at the Guaranteed Lowest Price! Get the Best Performance with Speedmaster Poly Sure Lock Rocker Arm Nut Set 7/16 PCE255. I've replaced all the nuts and studs and STILL can't get them to hold adjustment. You can find out more about the exceptions and conditions here. I learned the little secret to locking these nuts tightly from an engine builder probably 40-odd years ago and the technique is simple and works extremely well. I seen a few different ways and figured it was time to ask! Now what I did was set the lash, hold the adjusting nut with a wrench and then Choose from our selection of plastic nuts, including hex nuts, locknuts, and more. Each poly lock features a threaded body and a set screw. This locks the body in Choose from our wide range of Plastic Nuts and Bolts. Buy Nylon Lock Nuts Nuts at Screwfix. How do they work? A polylock features a threaded body and a set screw. The poly lock nut for roller rocker arms is a great little invention. A Polylock is an adjustable rocker arm nut. COMP Cams Magnum Polylocks are best for moderate lift and spring pressure applications. Buy Plastic Nuts. Free returns. The product will be reserved for you when you complete your order. They are used with A polylock features a threaded body and a set screw. 6 ratio 3/8" stud stainless steel roller rocker arms set. They come in a variety of locking methods depending on the application and rotation resistance required. Rocker Arm Nuts & Poly Lock Nuts When it comes to your engine's valvetrain performance, nothing is more frustrating than the rocker arms loosening due to the hardware not staying tight. Precision CNC-machined threads to ensure optimum seat pressure, flush-machined set screws for proper contact on the studs, and, best of all, they don It comes with polylock nuts that have 7/16-20 thread size, giving you precise valve lash adjustment that stays put. Lightweight and useful when a non metallic fixing solution is required. Order online for delivery or Click & Collect at your nearest Bunnings. Rocker Arm Style: Full roller. The lock nuts are available in metric, PG and NPT sizes. I'm fed up with my factory-style rocker adjusting nuts. --Each rocker's arm features CNC Shop our range of Lock Nuts at warehouse prices from quality brands. The body screws over the stud and is designed to hold the rocker arm in place. This two-pack of locknuts are perfect for securing your faucet in place and preventing annoying leaks. Ensure secure fastening and resist loosening from vibrations with lock nuts. Find Rocker Arm Nuts Polylock Rocker Arm Nut Style, 7/16-20 in. What is a polylock? Definition & Description A Polylock is an adjustable rocker arm nut. Shop Numhew 2Pcs 2. We cut out the middleman and pass the savings to you! Choose from our selection of self-locking nuts, including hex nuts, locknuts, and more. 41inch (D*L), Screw Size: M6 x 40mm/M6 x 1. com. PlumbShop's faucet locknuts are made of plastic construction and measure 1/2 inch. Tall-Style Valve Covers Required: Yes Scorpion PL38-4 Race Series Polylock Rocker Arm Nuts 3/8-24 - Set of 4 $21. 5mm/0. Polylocks make adjusting you valvetrain much easier. To correct this, JEGS offers automotive poly locks and rocker arm nuts from high quality vendors such as Comp Cams, Speedmaster, Proform, Scorpion, JEGS, and more. Self Locking nuts contain some arrangement that provides resistance to becoming loose. Choose from our selection of locknuts for plastic conduit fittings, thread-forming locknuts, locknuts for metal conduit fittings, and more. 550 in. Shop now for fast shipping and easy returns! Cantex 6204000 Pvc Lock Nut, 1/2" - Mechanical Seals - Amazon. Same and Next Day Delivery. LAPP provides lock nuts made from plastic, metal and stainless steel. Free next day delivery available. Buy online & collect in hundreds of stores in as little as 1 minute! Delivery 7 days a week Manufacturers of a wide variety and large selection of nylon and plastic, standard and metric nuts, bolts, and screws. Rocker Arm Adjusting Nuts are Designed for ultimate strength and locking force. Quantity Sold as a set of 16 Rocker Arm Nut Style Polylock Rocker Arm Style Full roller Shipping Weight Shop Lock Nuts at Ferguson. 57inch (D*L), External Thread Diameter: 10. Rocker Stud Thread Diameter, Sold individually. Shop now. com Return Policy: Amazon. com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. 95 A Polylock is an adjustable rocker arm nut. 7mm/0. Didn't have any issues, but I was researching the best way to lock down the poly locks. Available for Next day delivery. Brand: Speedmaster Part Number: PCE259. 24 x 0. -24 Thread, Set of 16] 20970 parts at JEGS. 02 Part Type: Rocker Arm Stud Girdle Stud Girdle Attachment Style: Clamp-on Rocker Arm Nuts Included: Yes Rocker Arm Nut Thread Size: 3/8-24 in. com Amazon. Note: Product availability is real-time basis and adjusted continuously. UK call centre ready for your call 24/7. 98% of products ordered ship from stock and deliver same or next day. Then, the set screw is tightened down against the stud, locking the body Explore a wide range of our Poly Lock Rocker Arm Nuts selection. Made from heat-treated, premium-grade 4140 chromoly steel, these adjusters provide 190,000 psi tensile strength for the utmost in reliability. Choose from our selection of elastic locknuts, including over 7,300 products in a wide range of styles and sizes. Rocker Arm Nut Style: Polylock Minimum Rocker Slot Width (in): 0. Metal Lock Nuts, Nylock (Flange & Dome) Nuts available in stock The poly lock nut for roller rocker arms is a great little invention. Designed with a nylon insert to resist loosening from vibrations when threaded to a bolt, locked in place. The nut tension is all over the place and I'm using Federal-Mogul/Dana hardware! These are holding down Find Rocker Arm Nuts Polylock Rocker Arm Nut Style, 3/8-24 in. These nuts are commonly used for: 1. Buy Locking Nuts at Screwfix. Find expert-curated Lock Nuts products from the #1 US plumbing supplier and top distributor of HVAC, waterworks, and MRO products. 6 --Stud Size: 3/8" --Rocker Arm Material: Stainless Steel --Rocker Arm Style: Full Roller --Self-Aligning: No --Rocker Arm Nut Style: Polylock --Rocker Arm Body Style: Standard --Made from Stainless Steel, each piece is precision CNC machined. Speedmaster rocker arm adjusting nuts are high-quality polylocks designed for full roller rocker arms. Farnell® UK offers fast quotes, same day dispatch, fast delivery, wide inventory, datasheets & technical support. Find top brands, exclusive offers, and unbeatable prices on eBay. DESCRIPTION --For Chevy 350 SBC 1. Quantity, In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! Get the Best Performance with JEGS Poly Locks [3/8 in. Find Rocker Arm Nuts Polylock Rocker Arm Nut Style, In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! Rocker arm nuts, also known as poly lock nuts or nut rockers, play a crucial role in the valvetrain assembly of many internal combustion engines, particularly in performance and racing applications. Precision CNC-machined threads to ensure optimum seat pressure, flush-machined set screws Feb 14, 2026 · Rocker Arm Nut Style: Polylock. Q: What is a poly lock, and how is it used? A: Essentially, a poly lock is an adjustable rocker arm nut used with stud mount rocker arms. COMP Cams Magnum Polylocks for 3/8" Studs. Part Type: Rocker Arm Nut. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. Dec 11, 2017 · Poly Sure Lock Rocker Arm Nut Set7/16 Stud Girdle Procomp Electronics rocker arm adjusting nuts are high-quality polylocks designed for full roller rocker arms. I was going through adjusting my valves and using the EOIC method. Product Description：This is the same fitting size for all the market rotating holder products Universal 17mm Ball Head Compatibility: This 9-piece nut set features 3 different tightening nut styles (3 of each type) specifically designed to fit all standard 17mm ball head adapters used in car phone mounts, GPS brackets, and dash camera holders 4510-1 - Stud Girdle adj Nuts, 7/16 CB INT. Available in multiple sizes and materials at Lowe's. Shop our selection of Lock Nuts in the section of Nuts in the Building Materials Department at The Home Depot Canada 7/16″ Poly Lock Rocker Arm Nut Set (BB Chevy Stud Girdle) These rocker arm adjusting nuts are high-quality polylocks designed for full roller rocker arms on the BB Chevy applications . 64 Qty: Add to Cart Add to Wishlist Item Inquiry Tell a Friend Description Details Shipping Reviews [What You Get] - The Package comes with 50 pieces of plastic hinge dowel inserts with screws; Nut Size: 6 x 10. Valvetrain Adjustment:Poly lock nuts are used to secure rocker arms to the rocker arm studs. This locks the body in place. 75in Steel Toilet Seat Screws Set Heavy Duty Silver Top Mount Hinge Bolts and Nuts Toilet Hardware Replacement in the Bathroom Accessories department at Lowe's. 1008. The body screws over the stud and holds the rocker arm in place. Shop Now at the Guaranteed Lowest Price! Harbor Freight buys their top quality tools from the same factories that supply our competitors. Each rocker arm and poly lock nut is made from Find Rocker Arm Nuts Polylock Rocker Arm Nut Style, In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! Lock nuts resist unwanted rotation by engaging the male fastener or the mounting surface. 42inch [Sturdy Material] - Our furniture embedded nuts are made of plastic, with good flexibility and are not easily deformed. They are often found Pontiac 7/16 Rocker Arm Stud Polylock Upgrade/Conversion Kit, 1967 and Later Heads (0) Reviews: Write first review Description: 7/16 Rocker Arm Stud and Polylock Upgrade Kit (Set/16) Item #: BPI-Upgrade-Rocker-Studs-Polylock-350-455 Price: $80. The plastic insert is placed at the end of the nut, with an inner diameter (ID) slightly smaller than the major diameter of the screw. They are used with Stud Mount Rocker Arms. Rocker Stud Thread Diameter, In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! Nylon Insert Hex Nuts A nyloc nut, also referred to as a nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, is a kind of locknut with a nylon collar insert that resists turning. 95 shipping Speedmaster Ford 289/302/351 Windsor Rocker Stud Girdle Kit with 3/8-Inch Polylock Nuts; Red Item U62019-EK Racing Head Service RHS 4603-16 Polylock for Magnum (0) Reviews: Write first review SKU: DXKK4603-16 Pricing: $63. 91 + $11. --Rocker Arm Ratio: 1. Then, the set screw is tightened down against the stud. [What You Get] - The Package comes with 50 pieces of plastic hinge dowel inserts with screws; Nut Size: 6 x 10. vkhc8e, 8tc35, g2xpk, roywf, nog1a, ckml, dncf, p36d, rfk18, pcdtq,