Model: SPS-B-271

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 1.250 inches and 1.607 inches

Fastener Length

Between 3.295 inches and 3.375 inches

Head Style

Knurled no. 1

Head Diameter

Between 0.642 inches and 0.656 inches

Head Height

Between 0.430 inches and 0.437 inches

Internal Drive Style

Hexagon

Thread Diameter

0.438 inches

Width Across Flats

0.375 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

190000 pounds per square inch

Hardness Rating

38.0 rockwell c and 43.0 rockwell c

Minimum Yield Strength

170000 pounds per square inch

Material

Steel uns k03104

Material Specification

Astm a574 assn standard single material response

Thread Series Designator

Unrc

NSN

5305-01-386-7837

Part Number

SPS-B-271

Description

Screw,cap,socket Head

CAGE

56878

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.

Part SPS-B-271 NSN 5305-01-386-7837

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

16282

FIIG:

A003B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

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:

0.2000lbs

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:

573

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318152000
SITC: 69421
End Use: Iron and steel products, other
NAICS: 332722
USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment