3/8-12 M1 STUB ACME × 12 TPI External (Screw) Thread Specifications

ASME B1.8 Modified Form 1 Stub Acme (h = 0.375P) per ASME B1.8 — bolt/screw dimensions

Technical Specifications

Parameter	Notation	Value
Major Diameter (Basic)	D	0.3750 in
Pitch Diameter (Basic)	D2	0.3438 in
Minor Diameter (Basic)	D1	0.3125 in
Pitch	P	0.0833 in
Basic Thread Height	h (0.375P)	0.0312 in
Crest Width	Fc	0.0336 in
Root Width	Fr	0.0284 in

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