NSN 5305-01-439-3978 D79163910B, D791639-10B, 01-439-3978
Product Details | MACHINE SCREW
5305-01-439-3978 An externally threaded fastener whose threaded portion is of one nominal diameter, No 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below No. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; and SCREW, CAP SOCKET HEAD.
Part Alternates: D79163910B, D791639-10B, 5305-01-439-3978, 01-439-3978, 5305014393978, 014393978
Hardware and Abrasives | Screws
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | 01-439-3978 | 06657 ( SCREW, MACHINE ) |
Drawings & Photos | NSN 5305-01-439-3978
Demand History | NSN 5305-01-439-3978
| Part Number | Request Date | QTY | Origin |
|---|---|---|---|
| D79163910B | 2012-06-170 | 3000 | US |
| 5305-01-439-3978 | 2008-06-157 | 50 | IL |
| 5305-01-439-3978 | 2008-06-156 | 50 | IL |
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Technical Data | NSN 5305-01-439-3978
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 0.312 INCHES NOMINAL |
| SCREW MATERIAL | STEEL CORROSION RESISTING |
| SCREW SURFACE TREATMENT | PASSIVATE |
| HEAD STYLE | A39 FLAT COUNTERSUNK |
| HEAD DIAMETER | 0.350 INCHES MINIMUM |
| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| LOCKING FEATURE | RETAINER |
Restrictions/Controls & Freight Information | NSN 5305-01-439-3978
| Category | Code | Description |
|---|---|---|
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Electro-static Discharge Susceptible: | A | No known Electrostatic Discharge (ESD) or Electromagnetic Interference (EMI) sensitivity |
| Category | Code | Description |
|---|---|---|
| No Freight Information | ||