The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-449-2935, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is M.s. Aerospace Inc. Dba Ms Aerospace Inc. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-449-2935 |
| Primary Part Number | 968972-1 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | M.s. Aerospace Inc. Dba Ms Aerospace Inc |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.204 INCHES MINIMUM AND 0.209 INCHES MAXIMUM IN |
| Head Height | 0.140 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN |
| Fastener Length | 2.530 INCHES MINIMUM AND 2.560 INCHES MAXIMUM IN |
| Thread Length | 0.480 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 5706 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 1.400 INCHES MINIMUM AND 1.440 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 1.450 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.204 INCHES MINIMUM AND 0.209 INCHES MAXIMUM IN |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.160 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | NICKEL OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 1.850 INCHES MINIMUM AND 1.880 INCHES MAXIMUM IN |
| Third Diameter From Head | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 968972-1 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| Reference | Meaning |
|---|---|
| 968972-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-449-2935 is a Bolt,externally Relieved Body, manufactured by M.s. Aerospace Inc. Dba Ms Aerospace Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-449-2935 has 1 manufacturer part number on file: 968972-1 (M.s. Aerospace Inc. Dba Ms Aerospace Inc).
Key specifications for 968972-1: Fourth Diameter From Head: 0.204 INCHES MINIMUM AND 0.209 INCHES MAXIMUM IN; Head Height: 0.140 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN; Fastener Length: 2.530 INCHES MINIMUM AND 2.560 INCHES MAXIMUM IN; Thread Length: 0.480 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN. 22 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.