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National Stock Number:
5305-01-627-4650
Federal Supply Class:
5305
National Item Identification Number:
016274650
Description:
SCREW,MACHINE
Detail:
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.
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Manufacturer Information:
| JSFB34 | 81755 | LOCKHEED MARTIN CORPORATION | | JSFB34V4-4M | 0UCY9 | M.S. AEROSPACE INC. | | JSFB34V4-4M | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | JSFB34V4-4M | 1GP79 | PILGRIM SCREW CORP | | JSFB34V4-4M | 27624 | SPS TECHNOLOGIES LLC | | JSFB34V4-4M | 81755 | LOCKHEED MARTIN CORPORATION |
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Techincal Specification:
| BEARING SURFACE OF HEAD SURFACE FINISH | 32.0 MICROINCHES | | FASTENER LENGTH | 0.66 INCHES MINIMUM AND 0.69 INCHES MAXIMUM | | HEAD HEIGHT | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | INTERNAL DRIVE STYLE | TORX | | III PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,HEX HEAD,SIX-LOBE RECESS | | PROPRIETARY CHARACTERISTICS | PACS | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.2500 INCHES | | SCREW MATERIAL DOCUMENT AND CLASSIFICATION | AMS4928 OR AMS4967 NATIONAL SPEC SINGLE MATERIAL RESPONSE | | SCREW MATERIAL | TITANIUM ALLOY | | SHANK SURFACE FINISH | 32.0 MICROINCHES | | SPECIAL FEATURES | DRY FILM LUBRICANT PER AS1701,CLASS VI;TEMP RANGE IS -365 DEG F TO 850 DEG F | | WIDTH BETWEEN FLATS | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.425 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 28 | | THREAD SURFACE FINISH | 32.0 MICROINCHES | | THREAD SERIES DESIGNATOR | UNJF |
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