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Screw, Close Tolerance
Part number NAS1578C3R1
NSN 5305-01-372-5329
NIIN 013725329
Item name Screw, Close Tolerance
Manufacturer Martin-Baker Aircraft Co. LTD
CAGE code U1604
FSC 5305 — Screws
Unit of issue EA
DEMIL code A
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Alternate part numbers NAS1578C3R1 CAGE 80205 P34938 CAGE U1604 10113777 CAGE A486G Technical characteristics
Thread Class 3A
Thread Direction Right-hand
Thread Length 0.363 inches nominal
Fastener Length 0.410-0.440 in
Head Style PAN
Head Diameter 0.360-0.374 in
Head Height 0.115-0.125 in
Grip Diameter 0.1890-0.1895 in
Internal Drive Style Offset cruciform (torque set)
Nominal Thread Diameter 0.190 in
Grip Length 0.052-0.072 in
Thread Qty per Inch 32
Material Iron alloy 660 overall
Surface Treatment Passivate overall per QQ-P-35
Thread Series UNJF
Specification NAS1578
Catalogue data is compiled from public DLA/FLIS sources and is provided for
identification. Availability, condition and certification are confirmed on
quotation. OmniSynk Distribution Services is a stocking distributor.
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