3M991-4-7

Socket Head Cap Screw

NSN 5305-01-255-3590

DEMIL

Shelf Life

UOM

NIIN

Demil:

Shelf Life:

N/A

UOM:

1 EA

NIIN:

012553590

Product Features

Optional knurled head

Detail Specifications

Thread Class:

Thread Direction:

Right-hand

Thread Length:

Between 0.390 inches and 0.460 inches

Fastener Length:

Between 0.838 inches and 0.888 inches

Head Style:

Flat chamfer

Head Diameter:

Between 0.365 inches and 0.375 inches

Head Height:

Between 0.244 inches and 0.250 inches

Internal Drive Style:

Hexagon

Thread Diameter:

0.250 inches

Width Across Flats:

Between 0.188 inches and 0.190 inches

Thready Qty Per Inch (tpi):

Hardness Rating:

38.0 rockwell c and 45.0 rockwell c

Material:

Steel

Surface Treatment:

Cadmium and chromate

Surface Treatment Specification:

Qq-p-416 type 2 cl 2 federal specification single treatment response

Thread Series Designator:

Unf

NSN:

5305-01-255-3590

Item Name:

Screw,self-locking,flat

Cage Code:

45722

Manufacturer Part Numbers

Part Number

Cage

RNCC

RNVC

RNAAC

Status

MSDS

SADC

Part Number:

3M991-4-7

Cage Code:

56878

RNCC:

RNVC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

3M991-4-7

Cage Code:

82896

RNCC:

RNVC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

3M991-4-7

Cage Code:

76301

RNCC:

RNVC:

RNAAC:

Status:

MSDS:

SADC:

Part Identification

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

16282

FIIG:

A003B0

Concept No.:

App. Key:

Cond. Code:

Status:

Part Materials

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

0.1000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Pricing & Availability

Submit this form for current pricing and availability quote on part number 3m991-4-7 and/or cross reference parts.

Definition Definition of approved item name (AIN): "Flat Self-locking Screw"

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.