The Bolt,ring, cataloged under National Stock Number 5306-01-377-1544, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Puritas Metal Products Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-377-1544 |
| Primary Part Number | 21237LF |
| Item Name | Bolt,ring |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Puritas Metal Products Inc |
| Status | ACTIVE |
| Ring Stock Diameter | 0.736 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN |
| Eye Stock Diameter | 1.500 INCHES NOMINAL IN |
| Thread Length | 2.250 INCHES NOMINAL IN |
| Shank Length | 2.250 INCHES NOMINAL IN |
| Style Designator | SWIVEL |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.125 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Shoulder Diameter | 1.500 INCHES NOMINAL IN |
| Surface Treatment | PRIMER OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 4130 OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21237LF PRIMARY | Puritas Metal Products Inc (USA) |
| 12417991 | Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc (USA) |
| 12417991 | Amz Alabama Inc. (USA) |
| Reference | Meaning |
|---|---|
| 12417991 | 7/2 Vendor item drawing reference U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5306-01-377-1544 is a Bolt,ring, manufactured by Puritas Metal Products Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-377-1544 has 3 manufacturer part numbers on file: 21237LF (Puritas Metal Products Inc), 12417991 (Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc), 12417991 (Amz Alabama Inc.).
Key specifications for 21237LF: Ring Stock Diameter: 0.736 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN; Eye Stock Diameter: 1.500 INCHES NOMINAL IN; Thread Length: 2.250 INCHES NOMINAL IN; Shank Length: 2.250 INCHES NOMINAL IN. 14 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.