The Bolt,internal Wrenching, cataloged under National Stock Number 5306-00-783-5188, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Borgwarner Pds (anderson), L.l.c.. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-783-5188 |
| Primary Part Number | 1948537 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Borgwarner Pds (anderson), L.l.c. |
| Status | ACTIVE |
| Width Across Flats | 0.219 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN |
| Head Height | 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Fastener Length | 0.860 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.460 INCHES MINIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C NOMINAL OVERALL |
| First Diameter From Head | 0.220 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.400 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 8630 OR STEEL COMP 4037 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.429 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 33657 | Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. (USA) |
| 1948537 | Delphi Automotive Uk Ltd (GBR) |
| 1948537 PRIMARY | Borgwarner Pds (anderson), L.l.c. (USA) |
| 7748639 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 1948537 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 1948537 | 5/9 Secondary reference General Motors Corp Delco Remy Div |
| 72085 | 5/9 Secondary reference U.S. Government activity |
| 5306007835188 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 1948537 | 5/9 Secondary reference General Motors Corp |
NSN 5306-00-783-5188 is a Bolt,internal Wrenching, manufactured by Borgwarner Pds (anderson), L.l.c., classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-783-5188 has 4 manufacturer part numbers on file: 33657 (Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.), 1948537 (Delphi Automotive Uk Ltd), 1948537 (Borgwarner Pds (anderson), L.l.c.), 7748639 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 1948537: Width Across Flats: 0.219 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN; Head Height: 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Fastener Length: 0.860 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.