American Slotted Hex UNF Thread Nuts
Product: American Slotted Hex UNF Thread Nuts
Standard: ASME B18.2.2-2022
Raw material: SWRCH45K,40CR,etc.
Surface: Plain,Yellow zinc plated
Specification Range: 1/4”-1”
Property Class:GR.2/GR.5/GR.8
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Product Introduction
Product: American Slotted Hex UNF Thread Nuts
Standard: ASME B18.2.2-2022
Raw material: SWRCH45K,40CR etc.
Surface: Plain,Yellow zinc plated
Specification Range: 1/4"-1"
Property Class:GR.2/GR.5/GR.8
I. General Industrial (Civilian / Construction Machinery / Automotive Parts Mainstream)
1. Shape, Slot, and Hex Size Reference: ASME B18.2.2-2022 (formerly ANSI B18.2.2). Table 6 specifically specifies Hex Slotted Nuts (Castellated/Slotted Hex Nut). All dimensions including spanner flats, thickness, slot depth/width, and pin hole mating sizes are shared by both UNC (coarse thread) and UNF (fine thread) Unified National threads. This standard serves as the core drawing basis for mass-produced general-purpose slotted nuts.
2. Thread Standard (Fine Thread UNF Mandatory): ASME B1.1. The Unified National Threads (UN/UNC/UNF/UNEF) profile, tolerances 2A/2B/3B, fine thread UNF machining, and go/no-go gauge inspection all comply with this standard.
3. Mechanical Properties / Material Grading: ASTM A563. For carbon steel slotted nuts, grades 2, 5, and 8 specify strength, heat treatment, and hardness. Stainless steel counterparts follow ASTM F594, and high-temperature alloys follow AMS series material specifications.
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High-Precision Fine Thread Slotted Nuts for Aerospace / Military Applications
1. Military Legacy Standards: MS Series (e.g., MS17826H Fine Thread Thin-Wall Slotted Nut, MS35649 Conventional Slotted Nut).
2. Current Aerospace Industry Standards: SAE AS Series (AS9363, AS9359), suitable for high-temperature alloy A286, high-strength aerospace hinge slotted nuts, covering all fine thread sizes.
Brief Usage Scenario Differentiation
•Ordinary automotive parts, agricultural machinery, hydraulic equipment, and general machinery: ASME B18.2.2 + ASME B1.1 + ASTM A563 (approximately 90% of market mass-produced slotted nuts adhere to this set);
• Aircraft, aerospace, and high-end military applications: SAE AS Aerospace Standards / MS Military Specifications for fine thread slotted nuts;
•All fine thread variants follow UNF for threading, while slotted and hex shape dimensions still uniformly adopt ASME B18.2.2. There is no standard distinction between coarse and fine thread external shapes.
Packaging & Logistics
- Main packaging materials: Small bags, small boxes, cartons, pallets, iron drums.
- Customized packaging is available according to customer requirements.
- Flexible bulk ordering plans are provided; transportation terms and delivery schedules are negotiable.
Certification & Warranty
We are certified by ISO9001:2015, IATF16949:2016, and other international quality standard certifications.
Long-term quality assurance and comprehensive after-sales service are provided.
Company covers an area of 1,500 square meters, equipped with advanced production equipment, and realizes one-stop manufacturing of products. The entire process includes: raw material feeding, annealing, wire drawing, cold heading, tapping, heat treatment, surface treatment, packaging and shipment. Our products are exported to Europe, America and the Middle East markets, and their quality has been well received by customers.
Our factory & quipment
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